Section 8. Operation
Dynamic Host Configuration Protocol (DHCP). Once the address is assigned, use
DevConfig, PakBusGraph, Connect, or the CR1000KD Keyboard/Display to look
in the CR800 Status table to see the assigned IP address. This is shown under the
field name IPInfo.
8.10.1.3 DNS
The CR800 provides a Domain Name Server (DNS) client that can query a DNS
server to determine if an IP address has been mapped to a hostname. If it has, then
the hostname can be used interchangeably with the IP address in some datalogger
instructions.
8.10.1.4 FTP Server
The CR800 automatically runs an FTP server. This allows Windows
Explorer to
access the CR800 file system with FTP, with drives on the CR800 being mapped
into directories or folders. The root directory on the CR800 can be any drive, but
the USR: drive is usually preferred. USR: is a drive created by allocating
memory in the USR: Drive Size box on the Deployment | Advanced tab of the
CR800 service in DevConfig. Files can be copied / pasted between drives. Files
can be deleted through FTP.
8.10.1.5 FTP Client
The CR800 can act as an FTP client to send a file or get a file from an FTP server,
such as another datalogger or web camera. This is done using the CRBasic
FTPClient() instruction. Refer to a manual for a Campbell Scientific network
link (see TCP/IP Links — List
(p. 570)), available at www.campbellsci.com, or
CRBasic Editor Help for details and sample programs.
8.10.1.6 HTTP Web Server
8.10.1.6.1 Default HTTP Web Server
The CR800 has a default home page built into the operating system. The home
page can be accessed using the following URL:
http:\\ipaddress:80
Note Port 80 is implied if the port is not otherwise specified.
As shown in figure Preconfigured HTML Home Page (p. 431), this page provides
links to the newest record in all tables, including the Status table, Public table,
and data tables. Links are also provided for the last 24 records in each data table.
If fewer than 24 records have been stored in a data table, the link will display all
data in that table.
Newest-Record links refresh automatically every 10 seconds. Last 24-Records
link must be manually refreshed to see new data. Links will also be created
automatically for any HTML, XML, and JPEG files found on the CR800 drives.
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